HEEIX! 67 
Var. I. subrufa. Reddish brown, solid, with a strong 
labial rib. 
Var. II. albtda. Thin, white. 
Var. III. conica. Smaller, spire raised. 
Var. IV. nana. Much smaller, depressed, with a 
strong labial rib. 
Var. V. subglobosa. More globular, thinner, light 
coloured, umbilicus small. 
12. H. sericea (siiky). 
Sub-giobular, thin, rather glossy, very pale grey, some- 
times tinged with yellow; thickly covered with white 
silky hairs; whorls six, tumid; spire raised, obtuse; suture 
rather deep; mouth semi-lunar, with white internal rib; 
umbilicus very small, 
This species is local, but abundant where it 
occurs. It is found in Scotland, Yorkshire, Anglesea, 
Hants, &c. 
Its chief distinction from H. hispida is its umbilicus, 
which is very small, while that of the last species is 
broad and deep ; besides which, the form of H. sericea 
is more globular, the spire more raised, and the bristles 
much thicker. The usual colour of H. hispida is much 
darker, though the Var. subglobosa is much like H. 
sericea both in shape and colour. 
Var. cornea. Horn-colour, very thin, labial rib 
strong. 
